Cup forming mandrel, method, and article

Details Cup forming mandrel, method, and article Cup forming mandrel, method, and article

B - Operations, Transporting

29

C

18/653, 18/914

B29C 17/02 (1980.01)

Patent

CA 1177615

ABSTRACT OF THE DISCLOSURE A cup-like container is formed with a rim by mount- ing a sleeve of thermoplastic sheet material on a mandrel, holding the sleeve in position on the mandrel by exerting a first radial force outwardly against the interior of an end portion of the sleeve, and heating the end portion. The end portion is then expanded, in a radial direction by the ap- plication of a second radial force outwardly against the in- terior of the end portion and the sleeve is translated along its longitudinal axis while the expanded end portion is held fixed against an abutment ring to cause the end portion to upset, thus forming the rim.

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